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three-valued logic

查词链接:https://www.dute.org/dict/three-valued_logic复制链接
三值逻辑
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abstract:
In logic, a three-valued logic (also trivalent, ternary, trinary logic, or trilean, sometimes abbreviated 3VL) is any of several many-valued logic systems in which there are three truth values indicating true, false and some indeterminate third value. This is contrasted with the more commonly known bivalent logics (such as classical sentential or boolean logic) which provide only for true and false.

网络释义
三值逻辑
三值逻辑(Three-Valued Logic):true,false,unknown SQL特有
常用短语
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